There's light on the horizon even as U.S. COVID-19 deaths pass 300,000: San Francisco was to see its first vaccinations Tuesday, a day after hospitals in Los Angeles started doling out the long-awaited shots. Erin Allday talks about this historic move, and what you need to know about the massive immunization drive ahead. And Annie Vainshtein reports on the psychology behind growing defiance of coronavirus lockdowns. | Unlimited Chronicle access: sfchronicle.com/pod

Kamala Harris bio podcast: Chronicled: Who Is Kamala Harris? sfchronicle.com/chronicled

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